memorable riff but not feel repetitive" and "would be a good amount of chord changes and, ideally, a fun guitar solo to add to the challenge". Two songs, Alice Cooper's "No More Mr. Nice Guy" and The Runaways' "Cherry Bomb", have been specifically re-recorded for use in Warriors of Rock. Megadeth's "Sudden Death" was specifically written as the final song within Warriors of Rocks setlist; its polyrhythms and difficult passes make it one of the toughest songs to beat. "Sudden Death" was nominated, but did not win, for "Best Metal Performance" for the 53rd Grammy Awards; this, along with the song "Baba Yetu" from Civilization IV and "Video Games Live", represents the first time a song composed for a video game has earned a Grammy nomination, with "Baba Yetu" continuing to win its award. Warriors of Rock supported additional songs through downloadable content that players could purchase on their respective console storefronts. All previous downloadable content that worked with Guitar Hero 5, including previous content from Guitar Hero World Tour, Guitar Hero: Smash Hits, and Band Hero, will work in Warriors of Rock. More than 500 tracks were available to players at launch. In addition, 39 songs from Guitar Hero: Metallica were importable into Warriors of Rock upon the game's release. In February 2011, Activision decided to shutter their Guitar Hero development, and initially stated that no further downloadable content will be forthcoming. Initial shipments of the game were also bundled with a copy of the Soundgarden compilation album Telephantasm; its new song "Black Rain" was included among the playable songs included on Warriors of Rock, while the remaining eleven tracks on the album were made available as downloadable content. Because of the album's inclusion with over one million shipped copies of Warriors of Rock, the Recording Industry Association of America certified Telephantasm as a platinum record; it is considered the first time such a distinction has been made based on "non-returnable units from a music label to a gaming company" according to Soundgarden's promotional group. Reception Guitar Hero: Warriors of Rock received mixed to positive reviews from gaming critics. Most critics acknowledged that Warriors of Rock was an attempt to distance itself from its competitor, the Rock Band series, and a return to the Guitar Hero series' roots. However, in the attempt to redefine the series, some critics thought Warriors of Rock failed to recapture the experience of playing